Method of making concrete pavements



(No Model.)

(1.11. 131111110011. METHOD 0E MAKING CONCRETE PAVEMENTS. No. 510,233.

Patented Dec. 5, 1893.l

FIG 2*.

buren tor. fr? 4. fai/fm@ i NITED STATES GEORGE A. BEDGOOD,

PATENT OFFICE.

METHOD OF MAKING CON-CRETE PAVEMENTS.

SPECIFICATION forming part of Letters Patent No. 510,233, dated December5, 1893.

Application filed .T une 29, 1893. Serial No. 479,165. (No model.)

To aZZ whom/.it may concern:

Be it known that I, GEORGE A. BEDGooD, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvementsin Methods of' MakingConcrete Pavements; and I do hereby declare the following to be a full,clear, and exact description of the invention.

ro My invention comprises a novel method of f constructing non freezingconcrete pavements, sidewalks, roadways, &c., the princi` pal steps inthis method being shown in the accompanying drawings, in whichi 5 Figurel is a cross section of an excavation within which the base of apavement is to be laid. Fig. 2 is a similar section of' a completepavement.

In order to illustrate my method of making zo pavements, I will supposethat a sidewalk is to be constructed, in which event the first step willbe the digging of an excavation A,

of the same length and width as the pavement, and of any suitable depth.The dis- 2 5 tance the excavation is carried down will be determined bythe nature of the ground, but need not exceed six or eight inches,unless the sidewalk is to be laid where frost penetrates a great way.After the'excavation is 3o made, its bottom is 4thoroughly saturatedwith oil, as indicated at B, crude petroleum being preferred on accountof its cheapness, although the invention is not limited in this respect.The oil is poured into the trench without preparing t-he latter in anymanner, so as to preserve a natural foundation for the pavement, whichbase cannot be injured by frost. The next step consists in filling thetrench or excavation almost full of a con- 4o crete or grouting O,prepared as follows: I-

has hardened, I ram it very thoroughly, so as to produce an even, uppersurface, which ramming causes some oil to lwork up through theinterstices of said filling. The concrete 5o O is now covered with afinishing layer of cement 'mixed with the above-described brine, whichlast coatD may be two or three inches thick. Portland cement isgenerally used for this finishing coat, and when it is dried, thepavement is saturated with as much crude petroleum as it will absorb.This act completes the method of construction, and af'- fords a safepavement to walk upon, as the final coat of oil prevents frost and iceform- 6o ing on the wearing surface D, and rendering it slippery.

The first or lower coat of oil B performs an important part inpreservingthe pavement, as it renders it impossible for frost topenetrate the base of the structure.

In preparing roadways for heavy traffic, the excavation A may be two orthree feet deep, and the filling rammed therein may be made of rubbleinstead of gravel.` Finally,4 the 7o .cement coating D may be mixed witha coloring medium, so as to add to the finished appearance of thepavement.

I claim as my invention--V l. The Within-described ymethod of layingpavements &c., which method consists in making an excavation in theground, then saturating the bottom of said excavation Vwith oil, andfinally packing said excavation with a concrete filling, for the purposestated. 8o

2. The Within-described method ot laying pavements o., which methodconsists in making an excavation in the ground, then saturating thebottom of said excavation with oil, then packing said excavation with acon- 85 crete iilling, then covering this filling with a cement coat,and finally saturating said coat with oil, for the purpose stated.

In testimony whereof I aiix my signature in presence of two witnesses.

GEORGE A. BEDGOOD. Witnesses:

JAMES H. LAYMAN, HENRY VARwIe.

